The machine does not make stitches

When I press the Start-Stop Button or Foot Controller, my machine makes a whirring noise, but the Needle bar does not move.

When thread got tangled.

Tangled thread on wrong side of fabric

Why does the lower thread keep breaking?

Fabric is caught in the machine and cannot be removed

Upper thread tightened up

Why does my thread keep jamming?

Why does the upper thread keep breaking?

Why does the needle keep breaking?

Why won't the machine pick up the bobbin thread?